Title: Blocking-Problem
Last modified: November 13, 2017

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# Blocking-Problem

 *  Resolved [heroh74](https://wordpress.org/support/users/heroh74/)
 * (@heroh74)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/blocking-problem/)
 * Hi,
 * today I installed Piwik on my site. Ninja Firewall now is blocking some files,
   I think. I can use Piwik if I disable the Firewall and if I enable it, there 
   are Errors displayed:
 * Please check that the web server has enough permission to write to these files/
   directories:
    For example, on a GNU/Linux server if your Apache httpd user is,
   you can try to execute
 * and
 * “Debug: the original error was
    session has already been started by session.auto-
   start or sess”
 * Is there a way to tell the firewall, that Piwik is no aggressor?
 * Regards
    Daniel
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fblocking-problem%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/)
 * (@nintechnet)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/blocking-problem/#post-9677524)
 * Hi,
 * This is a known issue. Piwik starts a PHP session but does not check if one has
   been started already. You would need to whitelist its folder, see those two discussions:
 * [https://wordpress.org/support/topic/problems-with-piwik-session-id](https://wordpress.org/support/topic/problems-with-piwik-session-id)
 * [https://wordpress.org/support/topic/alternate-htninja-location-for-shared-hostingproblems-related-to-piwik](https://wordpress.org/support/topic/alternate-htninja-location-for-shared-hostingproblems-related-to-piwik)
 *  Thread Starter [heroh74](https://wordpress.org/support/users/heroh74/)
 * (@heroh74)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/blocking-problem/#post-9677725)
 * Fixed the problem. I installed piwik in a subdomain. Thank you for support! 🙂

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Blocking-Problem’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [heroh74](https://wordpress.org/support/users/heroh74/)
 * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/blocking-problem/#post-9677725)
 * Status: resolved